Agent meaning

noun

1. an active and efficient cause; capable of producing a certain effect

   “their research uncovered new disease agents”

2. a representative who acts on behalf of other persons or organizations

3. a substance that exerts some force or effect

4. a businessman who buys or sells for another in exchange for a commission

   Synonymsfactorbroker

5. any agent or representative of a federal agency or bureau

   Synonymsfederal agent

6. the semantic role of the animate entity that instigates or causes the happening denoted by the verb in the clause

   Synonymsagentive role